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Engine Hardware

Most engine hardware including head studs, VANOS bolts, and exhaust studs can only be used once. While most of the accessory bolts and miscellaneous hardware can be re-used it is often handy to have a spare bolt or bracket just in case one breaks. Any aluminum bolt, such as those found in the N52 engine MUST be replaced no matter the age or visual condition.

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Athena Cut Ring Head Gasket - 84.5mm - BMW M50 M52 (84mm Bore) ...

T#:26171655

Part#: ATH-HG-CR-M50-84

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$ 324.99 USD

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$ 324.99 USD

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Upgrade your BMW engine's performance with the Athena Cut Ring Head Gasket. This gasket replaces BMW part # 11121726619 and 11121726617 and is specifically designed for M50 & M52 iron block inline 6-cylinder engines found in E34/E36 chassis. Standard OEM & MLS gaskets can only handle a certain amount of cylinder pressure before they start to leak, making the Athena Cut Ring Head Gasket the recommended choice for applications making 16+ psi. A compression leak passing the head gasket can cause a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure. Athena's gasket is crafted with premium quality reinforced M0115, an asbestos-free material that's original equipment approved and renowned for its superior quality. The AISI 304 stainless steel Cooper Rings bite into the aluminum head, providing maximum sealing capabilities around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2-bar boost. Before installation, it is crucial to have the mating surfaces of the cylinder head and block professionally cleaned and resurfaced to ensure they are completely flat. Please be aware that the gasket should have a size that is 0.5mm to 1mm larger than the piston. For example, if the piston measures 84mm, then the gasket should be the next size up, either 84.5mm or 85mm. Installation instructions: Make sure that the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant. Install the Cut Ring gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation. Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions. Follow the manufacturer's recommended torque specifications and tighten the bolts or studs in the proper sequence to ensure even clamping force across the gasket. After the initial tightening, re-torque the head bolts or studs after the engine has been started and then allowed to cool to room temperature. This will ensure that the gasket is properly seated and compressed. It is recommended to not use any additional sealant on the MLS gasket, as it is already coated with a Viton rubber sealant. Using additional sealant can hinder the performance of the gasket.

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BMW N54 ARP Head Stud Kit

T#:17538610

Part#: ARP-HSK-N54-14

In Stock

$ 599.99 USD

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$ 599.99 USD

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The VAC Motorsports ARP Head Stud Kit was put together by VAC and ARP’s finest engineers. This is a completely custom kit designed specifically for the almighty N54. *High Boost (25+ psi application) option features: (14) 11mm ARP Head Studs (14) ARP Washers for 11mm Studs (14) ARP Nuts for 11mm Studs Install Tips: MUST drill and tap the (4) 9mm holes in the engine block to make them 11mm holes. This way all the engine block holes are 11mm, and fit ALL (14) 11mm Studs. Torque Specs: All studs torque down through 3-equal steps to 95 ft lbs ***This is NOT the Chrysler and Volvo stud kits! VAC Motorsports and ARP engineers designed and assembled this kit with high grade material, specifically so standard street-use or high-boost N54 owners have a PROPER kit that does not fail over time, such as the retro-fit Chrysler and Volvo head stud kits. ARP is the world leader in fastener technology. Makers of the finest fasteners in the market, especially for BMW engines, ARP is the brand you can count on when you want the highest reliability possible. If you are looking for high performance from your BMW engine, then ARP Head Stud Kits are a must. All kits come complete with hardened parallel-ground washers and aerospace-quality nuts.

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ARP Head Stud Kit - BMW N55/S55

T#:23416542

Part#: ARP-HSK-S56-CA

In Stock

$ 999.99 USD

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$ 999.99 USD

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BMW S58 3.0L ARP Head Stud Kit - CA625+

T#:22427036

Part#: ARP-HSK-S58-CA

Ships in 4 Business Days

$ 999.99 USD

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$ 999.99 USD

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BMW S58 3.0L ARP Head Stud Kit - CA625+ is the ultimate upgrade for the BMW S58 engine, specifically designed for high-performance models such as the F97 X3M, F98 X4M, G80 M3, G82 M4, G83 M4, and G87 M2. Manufactured by Turner Motorsport, this head stud kit ensures optimal engine reliability and performance.

Enhanced Strength: Featuring Custom Age 625+ material with a tensile strength of 260 ksi, this kit provides superior strength compared to factory bolts.
Prevents Head and Block Separation: Designed to handle increased boost levels and high-stress conditions, preventing potential head and block separation.
Precision Engineering: ARP’s advanced manufacturing process ensures that these head studs outperform standard factory bolts under extreme conditions.
Ideal for High-Performance Builds: Perfect for enthusiasts pushing the limits of their S58 engines, offering unparalleled durability and reliability.
Direct Fit: Specifically tailored for the turbocharged inline 6-cylinder BMW S58 engine, ensuring a seamless installation and optimal performance.

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ARP Rod Bolt Set - M20 - 53mm

T#:1061435

Part#: ARP-RBS-M20

Ships on Sep 1, 2026

$ 314.99 USD

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$ 314.99 USD

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ARP, the world’s leader in fastener technology. There is no substitute for the best! Planning to boost your M20? Building a high HP stroker engine? This rod bolt kit is for you! This kit provides higher strength, more clamping power, and the option to re-use the hardware unlike your OEM bolts. We run these in many of our own builds as well and are 110% satisfied with the fit and finish of these ARP bolts. We offer a 53mm UHL version for those running OEM M20 rods or a 44mm UHL version for those who have upgraded to S50/S52 OEM rods.

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Vargas Titanium Valve Cover Hardware Upgrade - Black - BMW B58, N55, ...

T#:52129732

Part#: VTT-TI-BOLTS-2-B

Back Ordered

$ 59.99 USD

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$ 59.99 USD

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The VTT Titanium Valve Cover Hardware Kit is the ultimate finishing touch for your BMW N55, S55, or B58 engine.

ARP Main Stud Kits - S58

T#:22427031

Part#: ARP-MSK-S58

Ships in 4 Business Days

$ 229.99 USD

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$ 229.99 USD

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Elevate your BMW S58 engines with the ARP Main Stud Kit, replacing part numbers 11118604584. These studs prevent main cap walk, ensuring stability and protecting the engine from potential damage. They also safeguard the engine block threads, adding an extra layer of protection. Opting for main studs over factory bolts requires engine builders to mic the bores. Studs may require a line hone for proper fitment and alignment, ensuring round and concentric main bearing bores, preventing premature bearing wear, and ensuring optimal oil clearance.

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Vargas Extended M7 Port Head Studs - Pair - BMW B58/N54/N55/S55 ...

T#:51672701

Part#: VTT-EXTENDED-STU

Ships on Aug 31, 2026

$ 3.99 USD

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$ 3.99 USD

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The VTT-FAB Extended M7 Studs are the professional’s choice for securing thick-flange manifolds on N54, N55, S55, and B58 engines.

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